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#include <bits/stdc++.h>
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using namespace std;
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int Peach() {
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int n = 1;
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for (int i = 1; i <= 9; i++)
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n = (n + 1) * 2;
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printf("%d\n", n);
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return n;
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}
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int main() {
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//10---1
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//9---4
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//8---10
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//递推版本
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Peach();
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return 0;
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}
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